3.2 Preparing for a Vault Installation 30
3.3 Selecting a Site for the Trillium Compact Vault 31
3.4 Preparing the Site for a Vault Installation 32
3.4.1 Common Types of Surface Installations 32
3.4.2 Performing a Vault Installation 34
3.4.3 Performing a temporary installation on Rock 34
3.5 Recommendations for Pier Construction 35
3.5.1 Choosing the Right Concrete 35
3.5.2 Decoupling the Pier and Vault Walls 36
3.6 Alignment, Leveling, and Placement Features 36
3.7 Aligning and Leveling a Trillium Compact in a Vault Installation 39
3.8 Theory and Practice of Insulation 40
3.9 Insulation Options 42
3.9.1 Insulating a Trillium Compact Vault with the Insulating Cover 42
3.9.2 Installing a Trillium Compact Vault in the Insulating Cover 43
3.9.3 Insulating a Trillium Compact Vault with a Rigid Foam Box 45
3.10 Connecting the Centaur digital recorder and the Trillium Compact 46
3.11 Verifying connection with the Centaur digital recorder 47
3.12 Installation Checklist for the Trillium Compact Vault seismometer 48
Chapter 4 - Post-Installation Activities 49
4.1 Troubleshooting Your Installation 49
Part 2 - Operation 52
Chapter 5 - Input &Output Signals 53
5.1 UVW and XYZ Output Signals 53
16889R10 • 2020-11-12 Page 5
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